Liftable luggage carrier on car roof

Abstract

The present disclosure relates to a liftable luggage carrier on a car roof. The liftable luggage carrier on a car roof includes: sliding frames, at least two sliding frames are arranged, the sliding frames are fixed on the car roof, and limiting baffles and several locking holes are provided on the sliding frames; sliding seats are slidably installed on the sliding frames, one or two sliding seats are arranged on the sliding frames, and the sliding seats are positioned on two sides of the limiting baffles respectively under the situation that two sliding seats are arranged; positioning devices are installed on the sliding seats to be used for positioning the sliding seats when the sliding seats slide to a position above the locking holes.

The invention claimed is: 
     
       1. A liftable luggage carrier on a car roof, comprising:
 sliding frames ( 1 ), wherein at least two sliding frames ( 1 ) are arranged, the sliding frames ( 1 ) are fixed on the car roof, and limiting baffles ( 12 ) and several locking holes ( 13 ) are provided on the sliding frames ( 1 ); 
 sliding seats ( 2 ), wherein the sliding seats ( 2 ) are slidably installed on the sliding frames ( 1 ), one or two sliding seats ( 2 ) are arranged on the sliding frames ( 1 ), and the sliding seats ( 2 ) are positioned on two sides of the limiting baffles ( 12 ) respectively under the situation that two sliding seats are arranged; 
 positioning devices, wherein the positioning devices are installed on the sliding seats ( 2 ) to be used for positioning the sliding seats ( 2 ) when the sliding seats ( 2 ) slide to a position above the locking holes ( 13 ); 
 connecting-rod devices, wherein one end of each connecting-rod device is rotatably connected to the corresponding sliding seat ( 2 ) and is positioned above the corresponding positioning device; 
 object carrying rods ( 51 ), wherein one end of each object carrying rod ( 51 ) is rotatably connected to the other end of the corresponding connecting-rod device; and 
 fixing lock hooks ( 61 ), wherein each fixing lock hook ( 61 ) is rotatably installed at the other end of the corresponding object carrying rod ( 51 ) to be used for being inserted into the corresponding locking hole ( 13 ) when the sliding seats ( 2 ) abut against the limiting baffles ( 12 ), and the fixing lock hooks ( 61 ) lock the object carrying rods ( 51 ); wherein 
 when the sliding seats ( 2 ) slide to the position above the locking holes ( 13 ), the object carrying rods ( 51 ) are lifted and lowered by means of the connecting-rod devices; when the object carrying rods ( 51 ) are lowered to one side of a car, the connecting-rod devices loosen the positioning device, and the positioning devices are inserted into the locking holes ( 13 ) to lock the sliding seats ( 2 ); and when the object carrying rods ( 51 ) are lifted to the sliding frames ( 1 ), the connecting-rod devices jack up the positioning devices, the positioning devices are separated from the locking holes ( 13 ), and the positioning devices loosen the sliding seats ( 2 ). 
 
     
     
       2. The liftable luggage carrier on a car roof according to  claim 1 , wherein sliding grooves ( 11 ) are provided on the sliding frames ( 1 ), and the sliding seats ( 2 ) are slidably inserted into the sliding grooves ( 11 ). 
     
     
       3. The liftable luggage carrier on a car roof according to  claim 2 , wherein several sliding wheels ( 21 ) are installed at bottoms of the sliding seats ( 2 ), and the sliding wheels ( 21 ) are movably inserted into the sliding grooves ( 11 ). 
     
     
       4. The liftable luggage carrier on a car roof according to  claim 2 , wherein limiting sliding blocks ( 511 ) are arranged on two sides of each object carrying rod ( 51 ), and the limiting sliding blocks ( 511 ) are movably inserted into the sliding grooves ( 11 ). 
     
     
       5. The liftable luggage carrier on a car roof according to  claim 1 , wherein the connecting-rod devices comprise:
 first connecting rods ( 41 ), wherein one end of each first connecting rod ( 41 ) is rotatably installed on the corresponding sliding seat ( 2 ) and is positioned at a top of the corresponding positioning device; 
 second connecting rods ( 42 ), wherein one end of each second connecting rod ( 42 ) is rotatably installed on the corresponding sliding seat ( 2 ) and is positioned on one side of the corresponding first connecting rod ( 41 ); 
 third connecting rods ( 43 ), wherein two ends of each third connecting rod ( 43 ) are rotatably connected to the corresponding first connecting rod ( 41 ) and the corresponding second connecting rod ( 42 ) respectively, and the object carrying rods ( 51 ) are fixed on the third connecting rods ( 43 ); and 
 tension devices, wherein two ends of each tension device are connected to the corresponding first connecting rod ( 41 ) and the corresponding second connecting rod ( 42 ) respectively, and the tension devices comprise air tension springs ( 46 ) or tension springs ( 44 ). 
 
     
     
       6. The liftable luggage carrier on a car roof according to  claim 5 , wherein the positioning devices comprise:
 first lock hooks ( 31 ), wherein the first lock hooks ( 31 ) are rotatably installed on the sliding seats ( 2 ), and a top of each first lock hook ( 31 ) is positioned at one end of the corresponding first connecting rod ( 41 ); 
 first elastic devices, wherein the first elastic devices are connected to the first lock hooks ( 31 ) and the sliding seats ( 2 ) respectively to be used for pressing the first lock hooks ( 31 ) on the sliding frames ( 1 ); and 
 second lock hooks ( 32 ), wherein the second lock hooks ( 32 ) are rotatably installed on the sliding seats ( 2 ) or the first lock hooks ( 31 ) and are each positioned on one side of the corresponding first lock hook ( 31 ); wherein 
 the first lock hooks ( 31 ) and the second lock hooks ( 32 ) are used for being inserted into the locking holes ( 13 ) to position the sliding seats ( 2 ), and the first connecting rods ( 41 ) are used for loosening and jacking up the first lock hooks ( 31 ). 
 
     
     
       7. The liftable luggage carrier on a car roof according to  claim 6 , wherein the second lock hooks ( 32 ) are rotatably installed on the first lock hooks ( 31 ), the first elastic devices comprise first springs ( 33 ) or first torsion springs ( 35 ), two ends of each first spring ( 33 ) are connected to the corresponding first lock hook ( 31 ) and the corresponding second lock hook ( 32 ) respectively to be used for pressing the first lock hooks ( 31 ) and the second lock hooks ( 32 ) on the sliding frames ( 1 ), and two ends of each first torsion spring ( 35 ) are connected to the corresponding first lock hook ( 31 ) and the corresponding second lock hook ( 32 ) respectively to be used for pressing the first lock hooks ( 31 ) and the second lock hooks ( 32 ) on the sliding frames ( 1 ). 
     
     
       8. The liftable luggage carrier on a car roof according to  claim 1 , further comprising second springs ( 62 ) or second torsion springs ( 64 ), wherein two ends of each second spring ( 62 ) are connected to the corresponding object carrying rod ( 51 ) and the corresponding fixing lock hook ( 61 ) respectively, and two ends of each second torsion spring ( 64 ) are connected to the corresponding object carrying rod ( 51 ) and the corresponding fixing lock hook ( 61 ) respectively. 
     
     
       9. The liftable luggage carrier on a car roof according to  claim 1 , further comprising auxiliary wheels ( 71 ), wherein the auxiliary wheels ( 71 ) are fixed at ends of the sliding frames ( 1 ) and are positioned below the object carrying rods ( 51 ). 
     
     
       10. The liftable luggage carrier on a car roof according to  claim 1 , further comprising a connecting pull rod ( 55 ), wherein two ends of the connecting pull rod ( 55 ) are connected to two adjacent fixing lock hooks ( 61 ) or object carrying rods ( 51 ) respectively.